Compensating for time stamp aging in systems employing fair packet queuing algorithms by (i) representing a time stamp of each head-of-line packet of a session with a finite number of bits, (ii) representing a system potential with a finite number of bits, (iii) storing a packet's time stamp when it...http://www.google.co.uk/patents/US6081507?utm_source=gb-gplus-sharePatent US6081507 - Methods and apparatus for handling time stamp aging